- An item that does not have an ISBN. This refers to most material published before 1970.
- An item that Fillz is unable to get an "exact match" for in Amazon's catalog when we do a lookup on Amazon using the ISBN/ASIN/UPC/EAN you entered into Fillz.
If you have entered an item into Fillz and we were not able to get an exact match to Amazon's catalog, we will display "Not Found" as the title. You can update the item details (Title, Author, etc.) manually by following the instructions here.
You can also import the missing bibliographic details by uploading a file in the Fillz Product Detail Loader Format.